1251012552 has 16 divisors (see below), whose sum is σ = 3127531440. Its totient is φ = 417004176.

The previous prime is 1251012523. The next prime is 1251012557. The reversal of 1251012552 is 2552101521.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 52125523 = 1251012552 / (1 + 2 + 5 + 1 + 0 + 1 + 2 + 5 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (1251012557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26062738 + ... + 26062785.

It is an arithmetic number, because the mean of its divisors is an integer number (195470715).

Almost surely, 2^1251012552 is an apocalyptic number.

1251012552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251012552 is an abundant number, since it is smaller than the sum of its proper divisors (1876518888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251012552 is a wasteful number, since it uses less digits than its factorization.

1251012552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52125532 (or 52125528 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 1251012552 is about 35369.6558083338. The cubic root of 1251012552 is about 1077.5081301346.

The spelling of 1251012552 in words is "one billion, two hundred fifty-one million, twelve thousand, five hundred fifty-two".